onTouchMove property Null safety

EventStream<TouchEvent> onTouchMove

Dispatched when the user touches the device, and is continuously dispatched until the point of contact is removed.

You have to opt-in for touch events by setting the InputEventMode to TouchOnly or MouseAndTouch in the stage options.

Implementation

EventStream<TouchEvent> get onTouchMove =>
    InteractiveObject.touchMoveEvent.forTarget(this);